Rainbow Electronics RFM02 User Manual

RFM02

ISM BAND FSK TRANSMITTER MODULE
RFM02

（the purpose of this spec covers mainly for the
physical characteristic of the module, for register
configure and its related command info please refer
to RF02 data sheets

）

RFM02

General Introduction

RFM02 is a low costing ISM band transmitter

module implemented with unique PLL approach. It

works with FSK modulated signal ranges from

433/868/915MHZ bands, comply with FCC, ETSI

regulation. The SPI interface is used to

communicate with microcontroller for parameter

setting. RFM02 works with RFM01 receiver module.

At 433MHZ band, the pair of module can work up to

300m in the free open air.

Features:

• Low costing, high performance and price ratio

• Tuning free during production

• FSK transmission

• PLL employed

• Fast PLL lock time

• High resolution PLL with 2.5 KHz step

• Programmable frequency deviation (from 30 kHz to 210 kHz, step 30 kHz)

• Programmable output power

• High data rate (up to 115.2 kbps with FSK modulation)

• Differential antenna output

• Automatic antenna tuning

• SPI interface

• Clock and reset signal output for external MCU use

• 10MHz crystal for PLL reference

• Programmable crystal load capacitor bank

• Wakeup timer

• low battery detection

• 2.2V - 5.4V power supply

• Low power consumption

• stand by current less than 0.3μA

Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com

RFM02

T ypical Application：

• Remote control

• Remote sensor

• Wireless data collection

• Home security system

• Toys

• Tire pressure monitoring system

Pin Definition：

SMD DIP

Definition TYPE function

FSK DI FSK data input

CLK DO clock out for MCU (1 MHz-10 MHz)

VDD S Positive power supply

nIRQ DO

SDI DI SPI data input

SCK DI SPI clock input

VSS S negative power supply, GND

nSEL DI Chip select (active low)

Interrupts request output（active low）

Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com

RFM02

Electrical Specification：

Maximum（not at working mode）

symbol parameter min max unit

Vdd Positive power supply -0.5 6.0 V

Vin All pin input level -0.5 Vdd+0.5 V

Iin Input current except power -25 25 mA

ESD Human body model 1000 V

Tst Storage temperature -55 125

Tld Soldering temperature(10s) 260

Recommended working range

symbol parameter min max unit

Vdd Positive power supply 2.2 5.4 V

Top operation temperature -40 85

DC Characteristics：

symbol parameter conditions/note min typ max unit

I

dd_TX_0

I

dd_TX_PMAX

current

consumption

current

consumption

433 MHz band

868 MHz band

915 MHz band

433 MHz band

868 MHz band

915 MHz band

0 dBm power

output

max power output

Ipd sleep mode current all blocks off 0.3 μA

Iwt waek-up timer current consumption 1.5 μA

Ilb low battery detector current

0.5 μA

consumption

Ix idle mode current only crystal work 1.5 mA

V

low battery detection accuracy 75 mV

lba

Vlb low battery detection range 0.1V step 2.2 5.3 V

Vil Low level input 0.3*Vdd V

Vih High level input 0.7*Vdd V

Iil Leakage current Vil = 0 V -1 1 μA

Iih

Leakage current V

ih

V

dd

= Vdd,

= 5.4V

12

14

15

23

25

26

-1 1 μA

℃

℃

℃

mA

mA

Vol Low level output I

Voh High level output I

= 2 mA 0.4 V

ol

= -2 mA Vdd-0.4 V

oh

Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com